This graph shows the number of unique .onion addresses for version 2 onion services in the network per day. These numbers are extrapolated from aggregated statistics on unique version 2 .onion addresses reported by single relays acting as onion-service directories, if at least 1% of relays reported these statistics. For more details on the extrapolation algorithm, see this blog post and this technical report.

This material is supported in part by the National Science Foundation
under Grant No. CNS-0959138. Any opinions, finding, and conclusions or
recommendations expressed in this material are those of the author(s) and do not
necessarily reflect the views of the National Science Foundation. "Tor" and the
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waived all copyright and related or neighboring rights in the data. Graphs are
licensed under a Creative Commons Attribution 3.0 United States License.